Reproducer.



'ai citizen of the i fp) l needle, and

l @ZE miam fi may concern:

Be if; known tha WLLLMM c o ine county of .flleg .s of Merylond, have made Mnproveniens in 'e .id useful the iollomng 1s e.

oei leoroducere, slieeiezrlioii.

'v invention .is en improvement in reprodneers, und lies for ie'object io provide 'u device of the Character specified, vwherein bei* is 'inounecl parallel with the and is Supported in knife edge hee 'nge i reins, give 1i the greatest lpossible ee loin oi". movemen., which 1ni ai. psriiel rear View. l

l is n section on lthe line vlo'l n perspective view looking from 'the svlns bar.

similar view of one oi the sup- A.or ihe stylus bar. oerspeetive vievv of one of for he 70er.

the

Fis. is n. perspee'ive view of one end of I'he inl-orion of fie syvlns bnr looking' from zioove, und f' S- is e. pnriiel edge view of the reprodncer.

in lhe present embodiment of the invention, the diaphragm @sing 1 cylindrical, .having ne one a. nierginnl laterally entendineflange The @seing is thickened abone poin'i in iis circumference, indicated at 8, lo provide a irm mounting' for the stylus ber'al, which has an angular lug 5 at its inner end Connected with the diziphrzigni 3. The diaphragm is held between rubber gash/els 7, O-shaped in cross section,

the said- Onslets being held by the fiange 2 and bv the base plate 8, which is eonnecef to 'the easing b screws 9. The diaphragm is thus held atY L e center of the easing'. The stylus bei, which is provided :it its ouer end with the threaded opening' 10 for the with the jeweled set screw 11 acnig es zi needle' and for holding the needle in place,

is supported loeween threaded Lenin, United Saies, and zi resifulernm has on its under side e .lightly fshofoed longitudinally extending groove 15, and at its upper side the ends ofthe ulelnin are cui away io forni fii'ttened surfaces 16. Screws l? are threaded through :these .fietened surfaces, and' the set screws have nei4` row liers 18 in V'lieir heads, es sho o .in 8, to engage iie s'eel or jewel poinied ends of the pins 13,A which through the' braeles Shown in` Fig. i". These brackets, es shown, comprise portions 19 und 20 offset laterally from each other, but parallel, the portion 19 having a `slot 21, while tlieportion E20 has s ihreoded opcning These lnoelieis are connected 'to the thickened edge by ineens of serews 23, Whieli are passed through lie slots and enopeninge in the thickened edge, and by loosening the screws the 'brackets may be edjnsted'oward and :from each other, @out principally to allow their movement, wihin limits, parallel to 'lie stylus bar. eindige lie ends of ehe jooiions 20. This adjustmen perniis the points 13 to occupy any relative position in the lier'fs 18, and thus ihreeded nilnence the equilibrium of the stylus loer l 4v. The portions 2O of he brackets are :1rriinged to overlap the ends 16 of the fulornm 14, so thee die pins 13, when they are passed through the openings 22, the kerfs of ille screws 1.7. engaged by n. lock not above the 'bracket to prevent displacement of ihe pin. The pins 12 are hreaded izhrongli the iliielened lilac-h pin 13 is engage portion from the rear side, and euch pin is engaged by lock nus of the thickened clnsel-.slniped ooints of the pins 12 engage :it opposite feces the sliehlv Welmoed Grooves 15 of the full r,

eruni.

It `will be noticed from un inspection of Figs. 4- and 8 flint the kei-fs 18 of the screws 17 are at. right :ingles to the groove 15, and that the screws 1T extend into the bottoni of the-groove 15. to engage' the pins 12, in case the stylus ber is moved 'too fer in either dii-eolien. Thot is the pins 12 assisted by Athe ,poin'is 13 engaging the kerfs 18 in the screws 17 limit the lateral movement of lie stylus The st vlns oai thus mounted parallel with the diaphragm, and is snpporjed by pointed pins above und below, zo possible 'freedom of i smell .if'esher .26 oj 'thin buf:

give it the greatest Triovement.

portion. The preferably order that it may yield enough to wpermit the kerls 18 to occupy a position parallel to the stylus bar, and also to assistin preventing the transmission of mechanical noises.

It will be noticed that the base Nor back plate S is made of two plates of metal ot unlike composition, the inner, vv iich is somewhat thicker, being hard brass, and the outer of bronze. These plates are soldered together, and assist greatly in producing a softer, less metallic, and more agreeable tone.

The top of the set screw ll is provided with a jeweled point 27, ground to properly track in the grooves of records o'l the perpendieularly undulating type, requiring a jeweled stylus. The stylus bar is also threaded into the opening 10 to allow jeweled thumb screw` 1l to screw into same, and may be used thus, with the. reproducer in a vertical position.. When it is screwed into side of the stylus bar, it may be used with the diaphragm of the reproducer facing and parallel to the record. The object is to provide a. jeweled thumb screw, thus dispensing with the use ot' a jeweled needle for records of the above type, and also to serve as a thumb screw for holding changeable styli when rusing records or the type requiring them.

I claim:

l. In a reproducer, the combination with the casing and the diaphragm, of a stylus bar extending parallel with the diaphragm and having an angular portion connected with the center thereof, said stylus bar having a transverse fulcrurn at the edge ot the casing, brackets secured to the edge of the diaphragm casing at opposite sides of the stylus bar, said brackets being adjustable toward and from each other and eaca having a portion overlying the adjacent end oitl the ulcrum in spaced relation, said ulcrum having` a slightly il-shaped groove on its under side and having set 'screws threaded through the ends of the ful/rum and extending into the grooves and h Y i g kei-ts in their heads extending transv rse to the ing the adjacent V-shaped: groove, pointed bearing pins threaded through the brackets and engaging the narrow kerfs in the heads of the screws and knife edge bearing pins threaded throughthe diaphragm casing and engaging the ii-shaped groove at the inner sides of the screws.

2. In a reproducer, the combination with the casing and the diaphragm, of a stylus bar extending parallel with the diaphragm and connected therewith, said stylus bar having a. transverse ulcrum at the edge of the casing, brackets secured to the edge of the diaphragm casing atopposite sides of vthe stylus bar, each bracket having a portion overlyend of the fulcrum in spaced relation, said ulcrum having a slightly V-shaped groove on its under side and ker'ts at the ends of its upper side and transverse to the. iirst-mentioned groove, pointed bearing pins in connection with the brackets and engaging the kerts, and knife edge' bearing' pins in connection with the diaphragm casing and engaging the firstmentioned vl-shaped groove.

3. In a reproducer, the combination with the casing and the diaphragm, or' a stylus bar extending parallel with the diaphragm and connected therewith, said stylus bar having a transversev tuleruni at 'the edge of the casing, said fulcrum having a slightly ii-shaped groove on its under side and kerfs at the ends of its upper side and extending transversely to the first-mentioned groove, and pointed bearing pins supported by the casing and engaging the grooves and kers.

in a reproducer, the combination of a casing and the diaphragm of a stylus bar extending parallel with the diaphragm and mounted to swing on the casing, said casing consisting of a ring and a base, the base being composed of two superposed and connected plates having dii'ierent coeilicients of expansion 5. lin a reproducer, a casing consisting of a ring and a base, the base being composed ot two plates having different eoeiiicients or expansion, superposed and connected.

VJUJLM TROUPE LKN, 

